Biology Questions

DNA - Deoxyribonucleic acid is a type of nucleic acid. The sugar contained in it is called Deoxyribose.

RNA - ribonucleic acid is a type of nucleic acid. The sugar contained in it is called Ribose.

Plants grow in size both in height and in grith. Enlargement  of cells already present cannot contribute much to the growth. Only addition of more and more cells could increase the size of the plant considerably.

Self pollination occurs in the flowers when the pollen grains of the flower falls on the stigma of the same due to wind or insects like moths and bees. This lead to the inbreeding.

The nervous system of the human brain consists of the central nervous system which has brain and the spinal cord and the peripheral nervous system which has perpheral, cranary, spinal nerves.

Every ecosystem must have Autotrophs.

Mitochondria is absent in Bacteria as well as in Blue Green Algae. They are seen in eukaryotic cells for respiration purpose.

The small intestine is the main area of the GI tract for absorption.

The small intestine has three separate sections. Theyare :

1. The duodenum

2. Jejunum and

3. Ileum.

Hence, the majority of nutrient absorption occurs in the duodenum and jejunum of small intestine.